Zhang Wentao, Lin Xian, Jin Zuanming, Ma Guohong, Zhong Minjian
Opt Express. 2013 Nov 18;21(23):27622-30. doi: 10.1364/OE.21.027622.
The terahertz paper photonic crystals, including one-dimensional stacks, two-dimensional square and hexagonal lattices as well as three-dimensional body-centered cubic lattice, are designed and fabricated. Femtosecond laser direct writing is employed to process paper layers. The transmission properties of these photonic crystals in THz range are characterized using time-domain THz spectroscopy. The experimental results are in good agreement with the numerical simulations and well explained by the photonic band-structure calculated by the plane wave expansion method. Our results demonstrate that paper photonic crystals have a good performance on molding the flow of THz radiation. From another point of view, the fabrication method proposed in this work can be widely extended to manufacture different micro-structures on various materials.
设计并制作了太赫兹纸基光子晶体，包括一维堆叠结构、二维方形和六边形晶格以及三维体心立方晶格。采用飞秒激光直写技术对纸层进行加工。利用太赫兹时域光谱对这些光子晶体在太赫兹波段的传输特性进行了表征。实验结果与数值模拟结果吻合良好，并通过平面波展开法计算的光子能带结构得到了很好的解释。我们的结果表明，纸基光子晶体在塑造太赫兹辐射流方面具有良好的性能。从另一个角度来看，本文提出的制造方法可以广泛扩展到在各种材料上制造不同的微结构。
